Differences in Nutrient Degradation Efficiency between Sorghum and Corn Based on Bionic Digestion of Pigs in Vitro
To compare the nutrient degradation efficiency between sorghum and corn and investigate the poten-tial of different types of sorghum to replace domestic yellow corn,imported American sorghum,and domestic low tannin and high tannin sorghum were employed to analyze the differences between the digestion of sorghum and corn nutrients in porcine foregut and hindgut by simulating the process of chemical enzyme digestion in the foregut and microbial fermentation in the hindgut through in vitro bionic digestion technology,five replicates and three blank controls were set up for each treatment.These results showed as follows:1)disappearance rates of nutrient of domestic low tannin sorghum,domestic yellow corn and imported American sorghum showed no significant difference during the digestion of pepsin process(P＞0.05),while which of domestic high tannin sorghum was significantly lower than that of domestic yellow corn,imported American sorghum and domestic low tannin sorghum(P＜0.05).2)Under the digestion of pepsin-trypsin or the digestion of pep-sin-trypsin and then fermentation of cecal microbiota,there was no significant difference in the nutrient disap-pearance rate between domestic low tannin sorghum and imported American sorghum(P＞0.05).However,both domestic low tannin sorghum and imported American sorghum exhibited a lower nutrient disappearance rate than domestic yellow corn(P＜0.05),and a higher nutrient disappearance rate than domestic high tannin sorghum(P＜0.05).3)Compared with the other treatments,the total gas production of porcine pepsin-trypsin enzymatic residues of high tannin sorghum exhibited a significant decrease at 36 and 48 h(P＜0.05)and the content of total volatile fatty acids in the fermentation broth was significantly decreased(P＜0.05),and the pH was significantly increased(P＜0.05).Based on the in vitro simulation of both chemical enzyme and microbial degradation digestion in porcine,the rate of nutrient disappearance of domestic low tannin sorghum showed no significant difference with that of imported American sorghum,whereas the rate of nutrient disappearance of domestic high tannin sorghum was lower.Therefore,although domestic low tannin sorghum is more suitable to corn as an energy feed ingredient than domestic high tannin sorghum,and the challenge of low nutrient digesti-bility of sorghum cannot be ignored.[Chinese Journal of Animal Nutrition,2024,36(6):3995-4002]
万方数据
维普
